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3mex

Crystal structure of MexR in oxidized state

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Multidrug resistance operon repressor

Pseudomonas aeruginosa

UniProt P52003

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 water × 2 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
1lnw 1lnw 1lnw 1lnw 3mex 4zzl

6 assemblies

Homotetramer
1lnw 1lnw

2 assemblies

Other homooligomers
1lnw

1 assemblies

Heteromeric or nucleic-acid complex
3ech

1 assemblies

View Construct and Data Evidence
UniProt name MEXR_PSEAE
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–142； UniProt 1–142 Author chain B； PDBConstruct 1–142； UniProt 1–142

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id3mex
Deposition date deposition_date2010-04-01
Structure title titleCrystal structure of MexR in oxidized state
Keywords keywordsantibiotics resistance regulation, oxidative stress, thiol modification, DNA-binding, Transcription, Transcription Regulation; Transcription, Transcription Regulation
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

3mex__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3mex__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

3mex__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）21.54 Å
Rg (electron density)20.27 Å
Total Rg21.07 Å
Atom count2296
Residues284
Excluded volume40675 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3mex__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (2)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3mexa_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.5 — 'Winged helix' DNA-binding domain
Family Family familya.4.5.28 — MarR-like transcriptional regulators
Domain ID domain_idd3mexb_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.5 — 'Winged helix' DNA-binding domain
Family Family familya.4.5.28 — MarR-like transcriptional regulators

CATH v4.4 (2 domains)

Domain ID domain_id3mexA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
Domain ID domain_id3mexB01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
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7. Citations (1)